DE112021003048T5 - COIL COMPONENT AND SUBSTRATE WITH INTEGRATED COIL - Google Patents

Abstract

A coil component has a primary winding that generates a magnetic field by external power supply, and a secondary winding through which an induced current generated by the magnetic field flows. The primary winding includes annular primary first/second turns when viewed in the first direction. The secondary winding includes annular secondary first/second turns when viewed in the first direction. The primary and secondary first turns are alternately arranged in the first direction to form a first tubular section. The primary and secondary second turns are alternately arranged in the first direction to form a second tubular section. The second tubular section is inside the first tubular section when viewed in the first direction. The input current in each primary first winding and the input current in each primary second winding flow in the same direction.

Description

TECHNICAL AREA

The present disclosure relates to a coil component and a substrate with an integrated coil.

STATE OF THE ART

Coil components such as inductors and transformers are used in a variety of electrical devices. Patent Document 1 discloses an example of a coil component (a reactor and a transformer) using a spiral coil.

TECHNICAL REFERENCE

PATENT DOCUMENT

Patent Document 1: JP-A-2011-124250

SUMMARY OF THE INVENTION

Problems to be solved by the invention

In general, it is desirable for inductors and transformers to have as little magnetic flux leakage as possible. This is because magnetic flux leakage can cause noise generation and heat generation.

The present disclosure has been proposed in view of the above circumstances, and an object of the present disclosure is to provide a coil component capable of reducing leakage magnetic flux and to provide a coil built-in substrate which has or comprises such a coil component.

means of solving the problems

A coil component according to a first aspect of the present disclosure includes a primary winding that generates a magnetic field by an input current from outside and a secondary winding through which an induced current generated by the magnetic field flows. The primary winding includes a plurality of primary first turns and a plurality of primary second turns, each of which is annular as viewed in a first direction. The secondary winding includes a plurality of secondary first turns and a plurality of secondary second turns, each of which is annular as viewed in the first direction. The plurality of primary first turns and the plurality of secondary first turns are alternately arranged in the first direction to form a first tubular portion. The plurality of primary second coils and the plurality of secondary second coils are alternately arranged in the first direction to form a second tubular section. The second tubular section is inside the first tubular section when viewed in the first direction. The direction in which the input current flows in each of the plurality of primary first windings and the direction in which the input current flows in each of the plurality of primary second windings are identical.

A coil component provided according to a second aspect of the present disclosure includes a winding that generates a magnetic field by an input current from outside. The winding includes a plurality of first turns and a plurality of second turns, each of which is annular when viewed in a first direction. The plurality of first turns are arranged in the first direction to form a first tubular section. The plurality of second coils are arranged in the first direction to form a second tubular section. The second tubular section is inside the first tubular section when viewed in the first direction. Each of the first tubular portion and the second tubular portion is annular when viewed in a thickness direction orthogonal to the first direction. The direction in which the input current flows in each of the plurality of primary first windings and the direction in which the input current flows in each of the plurality of primary second windings are identical.

A coil encapsulating substrate provided according to a third aspect of the present disclosure includes the coil component provided according to the first aspect or the coil component provided according to the second aspect. The coil encapsulating substrate includes a plurality of intermediate layers laminated in the thickness direction and a plurality of insulating layers interposed between the plurality of intermediate layers in the thickness direction. The coil component is formed by wiring patterns of the multiple intermediate layers.

Advantages of the Invention

The coil component and the coil encapsulating substrate according to the present disclosure can reduce magnetic flux leakage.

character list

• 1 14 is a perspective view showing a coil component according to a first embodiment;
• 2 is an enlarged view of part of 1 ;
• 3 Fig. 12 is a plan view of the coil component according to the first embodiment;
• 4 is a sectional view taken along line IV-IV in FIG 3 ;
• 5 is a perspective view showing 1 corresponds, but along the in 4 section plane shown (i.e. along the line IV-IV in 3 ) is partially cut away;
• 3 or. 6 14 is a bottom view showing the coil component according to the first embodiment;
• 7 FIG. 14 is a view obtained by omitting a part (part of a first tubular portion) from FIG 1 illustrated perspective view arises;
• 8th 14 is a perspective view showing a primary winding of the coil component according to the first embodiment;
• 9 Fig. 12 is a plan view of the primary winding of the coil component according to the first embodiment;
• 10 is a schematic view of FIG 8th and 9 shown primary winding viewed along a circumferential direction;
• 11 12 is a perspective view showing a secondary winding of the coil component according to the first embodiment;
• 12 12 is a plan view showing a secondary winding of the coil component according to the first embodiment;
• 10 or. 13 is a schematic view of the in the 11 and 12 secondary winding shown, viewed along the circumferential direction;
• 14 Fig. 12 is a schematic view showing part of the primary winding and part of the secondary winding, and illustrating an example of connection by each connection portion;
• 15 14 is a perspective view showing a coil encapsulating substrate according to the first embodiment;
• 16 14 is a plan view of the coil encapsulating substrate according to the first embodiment;
• 17 is a sectional view taken along line XVII-XVII in FIG 16 ;
• 18 14 is a perspective view showing a coil component according to a second embodiment;
• 19 is an enlarged view of part of 18 ;
• 20 Fig. 12 is a plan view of the coil component according to the second embodiment;
• 21 is a sectional view taken along the line XXI-XXI in 20 ;
• 22 14 is a bottom view showing the coil component according to the second embodiment;
• 23 FIG. 14 is a view obtained by omitting a part (part of a first tubular portion) from FIG 18 shown perspective view arises;
• 24 12 is a schematic view of a winding of the coil component according to the second embodiment, as viewed along the circumferential direction;
• 25 14 is a perspective view showing a coil encapsulating substrate according to the second embodiment;
• 26 14 is a plan view showing the coil encapsulating substrate according to the second embodiment; and
• 27 is a sectional view taken along line XVIII-XVIII in FIG 26 .

MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of a coil component and a coil encapsulating substrate are described below with reference to the accompanying drawings. In the following description, the same or similar elements are denoted by the same reference numerals, and descriptions of these elements are omitted.

A coil component A1 according to a first embodiment is described below with reference to FIG 1 until 14 described. The coil component A1 is z. B. a transformer and comprises a primary winding 1 and a secondary winding 2. The coil component A1 can have a magnetic core, but preferably has an air core structure without a magnetic core. The coil component A1 can have a toroidal or ring-like ("toroidal") appearance. Preferably, the planar or flat ("planar") shape of the coil component A1 is the shape of a substantially closed ring, such as. B. a circular ring (ie ring-shaped), an elliptical ring or a polygonal ring. The planar shape of the coil component A1 does not necessarily have to be closed. Preferably, the cross-sectional shape of the coil component A1 is in the shape of a substantially closed ring, such as e.g. B. an annulus (ie ring-shaped), an elliptical ring or a polygonal ring. The overall shape of the coil component A1 is defined by various combinations of the above planar shapes and cross-sectional shapes. The first embodiment describes the example in which the planar shape is ring-shaped and the cross-sectional shape is a rectangular ring-shape. For convenience, in a plan view of the coil component A1, the direction in which the center axis extends is referred to as the axial direction s, the direction around the center axis as the circumferential direction t, and the direction extending radially from the center axis as the radial direction u. The axial direction s corresponds to the thickness direction of the coil component A1. The circumferential direction t corresponds to the toroidal direction of the coil component A1. The cross-sectional shape given above refers to the cross-sectional shape in the plane defined by the axial direction s and the radial direction u. The circumferential direction t corresponds to “first direction”, and the axial direction s corresponds to “thickness direction”.

1 12 is a perspective view showing the coil component A1. 2 is an enlarged view showing part of 1 shows. 3 Fig. 12 is a plan view of the coil component A1. 4 is a sectional view taken along line IV-IV in FIG 3 . 5 is a perspective view showing 1 corresponds, but partly along the in 4 section plane shown (i.e. along line IV-IV in 3 ) is cut away. In 5 the cut off part is represented by imaginary lines (two-point chain lines). 6 12 is a bottom view showing the coil component A1. 7 FIG. 14 is a view obtained by omitting a part (a part of a first tubular portion 5A, which will be described later) from FIG 1 shown perspective view is created. 8th 12 is a perspective view showing the primary winding 1 of the coil component A1. 9 Fig. 12 is a plan view of the primary winding 1 of the coil component A1. 10 Fig. 12 is a schematic view of that shown in Figs 8th and 9 shown primary winding 1, viewed along the circumferential direction t. 11 12 is a perspective view showing the secondary winding 2 of the coil component A1. 12 12 is a plan view of the secondary winding 2 of the coil component A1. 13 Fig. 12 is a schematic view of that shown in Figs 11 and 12 shown secondary winding 2, viewed along the circumferential direction t. 14 12 is a schematic view showing a part of the primary winding 1 and a part of the secondary winding 2, showing examples of connection by a connection portion 13 (described later) and a connection portion 23 (described later). It should be noted that the connection portions 13 and 23 in FIGS 1 until 13 are omitted. 14(a) is an outside-in view in the radial direction u, 14(b) and 14(c) are views from opposite sides in the circumferential direction t, and 14 (d) and 14(e) are views from opposite sides in the axial direction s.

In the coil component A1, the primary winding 1 and the secondary winding 2 are alternately and double-wound. With the double winding of each of the primary winding 1 and the secondary winding 2, the coil component A1 includes a first tubular portion 5A and a second tubular portion 5B. Both the first tubular portion 5A and the second tubular portion 5B have a toroidal shape. As in 7 As shown, the second tubular portion 5B is inside the first tubular portion 5A. The first tubular portion 5A defines the outer periphery of the coil component A1. The first tubular portion 5A and the second tubular portion 5B are e.g. B. annular and have a common central axis. That is, the center axis of the first tubular portion 5A in plan view and the center axis of the second tubular portion 5B in plan view generally correspond to each other. The direction in which the central axis extends is the axial direction s. The cross-sectional shape of the first tubular portion 5A and the second tubular portion 5B is e.g. B. a rectangular ring.

The primary winding 1 generates a magnetic field from the outside due to the input current. As in the 8th until 10 and 14 shown, the primary winding 1 comprises a plurality of first turns 11, a plurality of second turns 13 and 12, respectively, and a connecting section 13. The first turns 11 correspond to the "primary first turns", the second turns 12 correspond to the "primary second turns". and the connection portion 13 corresponds to “primary connection portion”.

As in 10 shown, each of the first turns 11 has the shape of a rectangular ring, e.g. B. in a view along the circumferential direction t. As in 9 shown, the first windings 11 are arranged side by side along the circumferential direction t, viewed in the axial direction s. The first turns 11 are part of the first tubular portion 5A. As in 10 shown, each of the first turns 11 has a first upper conductor portion 111, a first lower conductor portion 112, and a pair of first connecting-conductor portions 113 and 114. The first upper conductor portion 111 corresponds to the "primary first upper conductor portion" of the the first lower line section 112 corresponds to “primary first lower line section” and the pair of first connection conductor sections 113 and 114 corresponds to “a pair of primary first connection conductor sections”.

In each of the first turns 11, the first upper wire portion 111 and the first lower wire portion 112 are spaced from each other in the axial direction s as shown in FIG 10 shown. As in 9 As shown, the first upper duct portions 111 and the first lower duct portions 112 each extend from the inner peripheral edge 51A of the first tubular portion 5A toward the outer peripheral edge 52A of the first tubular portion 5A as viewed in the axial direction. Each of the first upper pipe sections 111 and each of the first lower pipe sections 112 has the shape of a strip when viewed in the axial direction s. As in FIG 10 shown, each of the two first connecting conductor sections 113 and 114 extends from the first upper line section 111 along the axial direction s. The first connecting conductor section 113 leads to the first lower line section 112 of the same first turn 11. The first connecting conductor section 114 leads to the circumferential direction t adjacent first lower conductor section 112 of the first turn 11. Each of the two first connecting conductor sections 113 and 114 is generally orthogonal to the first upper conductor section 111 and the first lower conductor section 112. The first connecting conductor section 113 overlaps the inner peripheral edge 51A of the first tubular section 5A when viewed in the axial direction s. The first connection conductor portion 114 overlaps with the outer peripheral edge 52A of the first tubular portion 5A when viewed in the axial direction s. Each of the two first connection conductor portions 113 and 114 has the shape of a strip which extends when viewed along the radial direction u in the axial direction s.

In the present embodiment, each first upper duct section 111 is inclined in a first sense of the circumferential direction t with respect to the radial direction u, and each first lower duct section 112 is inclined in a second sense of the circumferential direction t with respect to the radial direction u. in the in 9 shown example, assuming that the radial direction u pointing to each first connection conductor portion 113 is the radial direction u11, the first upper line portion 111 leading to the first connection conductor portion 113 is in the circumferential direction t clockwise with respect to the Inclined radial direction u11. Each first lower line section 112 leading to the corresponding first connection conductor section 113 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u11. In this way, the first upper line portion 111 and the first lower line portion 112 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the first connection conductor portions 113 and 114 can be formed along the axial direction s.

In the present embodiment, two adjacent first upper pipe sections 111 are arranged in the circumferential direction t with a predetermined distance between them, as are two adjacent first lower pipe sections 112 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51A side and on the outer peripheral edge 52A side of the first tubular portion 5A. With such an arrangement, when viewed in the axial direction s, the dimension of each first connection conductor portion 114 along the circumferential direction t is larger than the dimension of each first connection conductor portion 113 along the circumferential direction t.

Two adjacent ones of the plurality of first turns 11 in the circumferential direction t are directly connected to each other, so that the input current flowing in the primary winding 1 flows through the plurality of first turns 11 in sequence. At this time, the input current is transmitted to the first connecting conductor portion 114 of each first turn 11 from the first lower conductor portion 112 of the adjacent first turn 11 located on a first side in the circumferential direction t. The input current then flows from the first connection conductor section 114 through the first upper line section 111 and the first connection conductor section 113 to the first lower line section 112. That is, in the in 10 In the example shown, the input current flows counterclockwise through each first winding 11. The input current is then passed to the adjacent first winding 11 located on a second side in the circumferential direction t. In this way, the input current of the primary winding 1 circulates through each of the first th windings 11. It should be noted that the direction of the input current in the first windings 11 may be opposite to the example described above. That is, the input current can be transmitted to the first lower conductor portion 112 of each first turn 11 from the first connecting conductor portion 114 of the adjacent first turn 11 located on the second side in the circumferential direction t. The input current can then flow from the first lower line section 112 through the first connection conductor section 113 and the first upper line section 111 to the first connection conductor section 114 . That is, in the in 10 In the example shown, the input current can flow through each first winding 11 in a clockwise direction.

As in 10 As shown, each of the second turns 12 is in the form of a rectangular ring, e.g. B. in a view along the circumferential direction t. As in 10 shown, every second turn 12 is located inside every first turn 11 viewed along the circumferential direction t. As in FIG 9 shown, the second windings 12 are arranged next to one another along the circumferential direction t, viewed in the axial direction s. The second turns 12 are part of the second tubular portion 5B. As in the 8th and 9 shown, the first windings 11 and the second windings 12 are arranged alternately in the circumferential direction t, viewed in the axial direction s. As in 10 shown, each of the second windings 12 has a second upper conductor section 121, a second lower conductor section 122 and a pair of second connection conductor sections 123 and 124. The second upper conductor section 121 corresponds to the "primary second upper conductor section", the second lower conductor section 122 corresponds to the "primary second lower line section” and the pair of second connection conductor sections 123 and 124 corresponds to “a pair of primary second connection conductor sections”.

In each of the second turns 12, the second upper wire portion 121 and the second lower wire portion 122 are spaced from each other in the axial direction s as shown in FIG 10 shown. As in 9 shown, the second upper duct portion 121 and the second lower duct portion 122 each extend from the inner peripheral edge 51B of the second tubular portion 5B toward the outer peripheral edge 52B of the second tubular portion 5B when viewed in the axial direction s. Each of the second upper duct portions 121 and each of the second lower line portions 122 has the shape of a strip as viewed in the axial direction s. As in FIG 10 shown, each of the two second connecting conductor sections 123 and 124 extends from the second upper line section 121 along the axial direction s. The second connecting conductor section 123 leads to the second lower line section 122 of the same second turn 12. The second connecting conductor section 124 leads to the second lower line section 122 of the second turn 12 adjacent in the circumferential direction t. Each pair of the second connection conductor sections 123 and 124 is generally orthogonal to the second upper line section 121 and the second lower line section 122. The second connection conductor section 123 overlaps the inner peripheral edge 51B of the second tubular section 5B when viewed in the axial direction s. The second connection conductor portion 124 overlaps with the outer peripheral edge 52B of the second tubular portion 5B when viewed in the axial direction s of the radial direction u in the axial direction s.

In the present embodiment, each second upper duct portion 121 is inclined in the first sense of the circumferential direction t with respect to the radial direction u, and each second lower duct portion 122 is inclined in the second sense of the circumferential direction t with respect to the radial direction u. in the in 9 shown example, assuming that the radial direction u pointing to each second connection conductor portion 123 is the radial direction u12, the second upper line portion 121 leading to the second connection conductor portion 123 is in the circumferential direction t clockwise with respect to the radial direction u12 inclined. Each second lower line section 122 leading to the corresponding second connecting conductor section 223 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u12. In this way, the second upper line portion 121 and the second lower line portion 122 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the second connection conductor portions 123 and 124 can be formed along the axial direction s.

In the present embodiment, two adjacent second upper pipe sections 121 are arranged in the circumferential direction t with a predetermined distance between them, as are two adjacent second lower pipe sections 122 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51B side and on the outer peripheral edge 52B side of the second tubular portion 5B. With such an arrangement, as viewed in the axial direction s, the dimension of each second connecting conductor portion 124 is ent along the circumferential direction t is greater than the dimension of each second connecting conductor portion 123 along the circumferential direction t.

Two adjacent ones of the plurality of second turns 12 in the circumferential direction t are directly connected to each other, so that the input current flowing in the primary winding 1 flows through the plurality of second turns 12 in sequence. At this time, the input current is transmitted to the second connecting conductor portion 124 of each second turn 1 from the second lower conductor portion 122 of the adjacent second turn 12 located on the first side in the circumferential direction t. The input current then flows from the second connection conductor section 124 through the second upper line section 121 and the second connection conductor section 123 to the second lower line section 122. That is, in the in 10 In the example shown, the input current flows counterclockwise through every second winding 12. Thus, the direction of the input current in the first windings 11 and the direction of the input current in the second windings 12 are the same when viewed along the circumferential direction t. In this way, the input current of the primary winding 1 circulates through each of the second windings 12. It should be noted that the direction of the input current in the second windings 12 may be opposite to the example described above. That is, the input current can be transmitted to the second lower conductor portion 122 of each second turn 12 from the second connecting conductor portion 124 of the adjacent second turn 12 located on the second side in the circumferential direction t. That is, in the in 10 In the example shown, the input current may flow through every other turn 12 in a clockwise direction. However, it should be noted that the direction of the input current through each first winding 11 and the direction of the input current through every second winding 12 should be the same when viewed along the circumferential direction t.

The connection portion 13 connects one of the first turns 11 and one of the second turns 12 to each other. As in 14 the connecting section 13 is shown connected, for example, to the first lower line section 112 of one of the first windings 11 and to the second upper line section 121 of one of the second windings 12 in order to electrically connect them.

The primary winding 1 includes the first turns 11 connected continuously along the circumferential direction t and the second turns 12 connected continuously along the circumferential direction t. With such an arrangement, the input current of the primary winding 1 first circulates through the first turns 11 and is then injected into the second turns 12 through the connection portion 13 to circulate through the second turns 12 .

Due to the magnetic field generated by the primary winding 1, an induced current flows in the secondary winding 2. As shown in FIGS 11 until 14 shown, the secondary winding 2 comprises a plurality of first turns 21, a plurality of second turns 22 and a connecting portion 23. The first turns 21 correspond to the "secondary first turns", the second turns 22 correspond to the "secondary second turns" and the connecting portion 23 corresponds to that "secondary connection section".

As in 13 As shown, each of the first turns 21 is in the form of a rectangular ring, e.g. B. in a view in the circumferential direction t. As in 12 shown, the first turns 21 viewed in the axial direction s are arranged next to one another in the circumferential direction t. The first turns 21 are part of the first tubular portion 5A. Each of the first turns 21 has a first upper line section 211, a first lower line section 212 and a pair of first connection conductor sections 213 and 214. The first upper line section 211 corresponds to the "secondary first upper line section", the first lower line section 212 corresponds to the "secondary first lower line section” and the pair of first connection conductor sections 213 and 214 correspond to “a pair of secondary first connection conductor sections”.

In each of the first turns 21, the first upper wire portion 211 and the first lower wire portion 212 are spaced from each other in the axial direction s as shown in FIG 13 shown. As in 12 As shown, the first upper duct portions 211 and the first lower duct portions 212 each extend from the inner peripheral edge 51A of the first tubular portion 5A toward the outer peripheral edge 52A of the first tubular portion 5A when viewed in the axial direction s. Each of the first upper pipe sections 211 and each of the first lower pipe sections 212 has the shape of a strip when viewed in the axial direction s. As in 13 shown, each of the two first connecting conductor sections 213 and 214 extends from the first upper line section 211 along the axial direction s. The first connecting conductor section 213 leads to the first lower line section 212 of the same first turn 21. The first connecting conductor section 214 leads to the first lower line section 212 the ers adjacent in the circumferential direction t th turn 21. Each of the two first connection conductor sections 213 and 214 is generally orthogonal to the first upper line section 211 and to the first lower line section 212. The first connection conductor section 213 overlaps with the inner peripheral edge 51A of the first tubular section 5A as viewed in FIG Axial direction s. The first connection conductor section 214 overlaps with the outer peripheral edge 52A of the first tubular section 5A when viewed in the axial direction s. Each of the two first connection conductor sections 213 and 214 has the shape of a strip, which extends when viewed in the radial direction u in of the axial direction s.

In the present embodiment, each first upper duct section 211 is inclined in the first sense of the circumferential direction t with respect to the radial direction u, and each first lower duct section 212 is inclined in the second sense of the circumferential direction t with respect to the radial direction u. in the in 12 shown example, assuming that the radial direction u pointing to each first connection conductor portion 213 is the radial direction u21, the first upper line portion 211 leading to the first connection conductor portion 213 is in the circumferential direction t clockwise with respect to the Inclined radial direction u21. Each first lower line section 212 leading to the corresponding first connecting conductor section 213 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u21. In this way, the first upper line portion 211 and the first lower line portion 212 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the first connection conductor portions 213 and 214 can be formed along the axial direction s.

In the present embodiment, two adjacent first upper pipe sections 211 are arranged at a predetermined distance from each other in the circumferential direction t, as are two adjacent first lower pipe sections 212 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51A side and on the outer peripheral edge 52A side. With such an arrangement, viewed in the axial direction s, the dimension of each first connection conductor portion 214 along the circumferential direction t is greater than the dimension of each first connection conductor portion 213 along the circumferential direction t.

Two adjacent ones of the plurality (or plurality) of first turns 21 in the circumferential direction t are directly connected to each other, so that the induced current in the secondary winding 1 flows through the plurality of first turns 21 in sequence. At this time, the induced current is transmitted to the first connection conductor portion 214 of each first turn 21 from the first lower conductor portion 212 of the adjacent first turn 21 located on the first side in the circumferential direction t. The induced current then flows from the first connection conductor section 214 through the first upper line section 211 and the first connection conductor section 213 to the first lower line section 212. That is, in the in 13 In the illustrated example, the induced current flows counterclockwise through each first turn 21. The induced current is then transmitted to the adjacent first turn 21 located on the second side in the circumferential direction t. In this way, the induced current of the secondary winding 2 circulates through each of the first turns 21. It should be noted that the direction of the induced current in the first turns 21 may be opposite to the example described above. That is, the induced current can be transmitted to the first lower conductor portion 212 of each first turn 21 from the first connecting conductor portion 214 of the adjacent first turn 21 located on the second side in the circumferential direction t. The induced current can then flow from the first lower line section 212 to the first connection conductor section 214 through the first connection conductor section 213 and the first upper line section 211 . That is, in the in 13 In the example shown, the induced current can flow through each first turn 21 in a clockwise direction. The direction of the induced current in the first turns 21 is determined by the magnetic field generated by the primary winding 1 .

As in 13 As shown, each of the second turns 22 is in the shape of a rectangular ring, e.g. B. in a view along the circumferential direction t. As in 13 As shown, every other turn 22 is located inside every first turn 21 as viewed along the circumferential direction t. As in FIG 12 shown, the second windings 22, viewed in the axial direction s, are arranged next to one another along the circumferential direction t. The second turns 22 are part of the second tubular portion 5B. As in the 11 and 12 shown are the first turns 21 and the second turns 22, viewed in the axial direction s, arranged alternately in the circumferential direction t. As in 13 shown, each of the second turns 22 has a second upper lead portion 221, a second lower lead portion 222, and a pair of second connecting conductor portions 223 and 224. The second upper lead portion 221 corresponds to "secondary second upper lead portion", the second lower lead portion 222 corresponds to "secondary second lower line section”, and the pair of second connection conductor sections 223 and 224 correspond to “a pair of secondary second connection conductor sections”.

In each of the second turns 22, the second upper wire portion 221 and the second lower wire portion 222 are spaced from each other in the axial direction s as shown in FIG 13 shown. As in 12 As shown, when viewed in the axial direction s, the second upper duct portion 221 and the second lower duct portion 222 each extend from the inner peripheral edge 51B of the second tubular portion 5B toward the outer peripheral edge 52B of the second tubular portion 5B. Each of the second upper pipe sections 221 and each of the second lower pipe sections 222 has the shape of a strip when viewed in the axial direction s. As in FIG 13 shown, each of the two second connecting conductor sections 223 and 214 extends from the second upper line section 221 along the axial direction s. The second connecting conductor section 223 leads to the second lower line section 222 of the same second turn 22. The second connecting conductor section 224 leads to the second lower line section 222 of the second turn 22 adjacent in the circumferential direction t. Each pair of the second connection conductor sections 223 and 224 is generally orthogonal to the second upper line section 221 and the second lower line section 222. The second connection conductor section 223 overlaps the inner peripheral edge 51B of the second tubular section 5B when viewed in the axial direction s. The second connection conductor portion 224 overlaps with the outer peripheral edge 52B of the second tubular portion 5B when viewed in the axial direction s. Each pair of the second connection conductor portions 223 and 224 has the shape of a strip which extends when viewed along the radial direction u in the axial direction s.

In the present embodiment, each second upper duct section 221 is inclined in the first sense of the circumferential direction t with respect to the radial direction u, and each second lower duct section 222 is inclined in the second sense of the circumferential direction t with respect to the radial direction u. in the in 12 shown example, assuming that the radial direction u pointing to each second connection conductor portion 223 is the radial direction u22, the second upper line portion 221 leading to the second connection conductor portion 223 is in the circumferential direction t clockwise with respect to the radial direction u22 inclined. Each second lower line section 222 leading to the corresponding second connecting conductor section 223 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u22. In this way, the second upper line portion 221 and the second lower line portion 222 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the second connection conductor portions 223 and 224 can be formed along the axial direction s.

In the present embodiment, two adjacent second upper pipe sections 221 are arranged in the circumferential direction t with a predetermined distance between them, as are two adjacent second lower pipe sections 222 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51B side and on the outer peripheral edge 52B side. With such an arrangement, viewed in the axial direction s, the dimension of each second connection conductor portion 224 along the circumferential direction t is larger than the dimension of each second connection conductor portion 223 along the circumferential direction t.

Two adjacent ones of the plurality of second turns 22 in the circumferential direction t are directly connected to each other, so that the induced current in the secondary winding 2 flows through the plurality of second turns 22 sequentially. At this time, the induced current is transmitted to the second connection conductor portion 224 of each second turn 22 from the second lower conductor portion 222 of the adjacent second turn 22 located on the first side in the circumferential direction t. The induced current then flows from the second connection conductor section 224 through the second upper line section 221 and the second connection conductor section 223 to the second lower line section 222. That is, in the in 13 In the illustrated example, the induced current flows counterclockwise through every other turn 22. Thus, the direction of the induced current in the first turns 21 and the direction of the induced current in the second turns 22 are the same when viewed along the circumferential direction t. In this way, the induced current of the secondary winding 2 circulates through each of the second turns 22. It should be noted that the direction of the induced current in the second turns 22 may be opposite to the example described above. That is, the induced current can be transmitted to the second lower conductor portion 222 of each second turn 22 from the second connection conductor portion 224 of the adjacent second turn 22 located on the second side in the circumferential direction t. The induced current can then be taken from the second lower line section 222 through the second connection connection conductor section 223 and the second upper line section 221 flow to the second connection conductor section 224 . That is, in the in 13 In the example shown, the induced current may flow through every other turn 22 in a clockwise direction. However, it should be noted that the direction of the induced current through each first turn 21 and the direction of the induced current through each second turn 22 should be the same when viewed along the circumferential direction t.

The connection portion 23 connects one of the first coils 21 and one of the second coils 22 to each other. As in 14 the connection section 23 is shown connected, for example, to the first upper line section 211 of one of the first windings 21 and the second lower line section 222 of one of the second windings 22 in order to electrically connect them.

The secondary winding 2 includes the first turns 21 connected continuously along the circumferential direction t and the second turns 22 connected continuously along the circumferential direction t. The first turns and the second turns are connected by the connecting portion 23 . With such an arrangement, the induced current of the secondary winding 2 first circulates through the first turns 21 and is then injected into the second turns 22 via the connection portion 23 to circulate through the second turns 22 .

In the coil component A1, the first turns 11 (the primary winding 1) and the first turns 21 (the secondary winding 2) are alternately arranged in the circumferential direction t and form the first tubular portion 5A. Also, the second turns 12 (the primary winding 1) and the second turns 22 (the secondary winding 2) are alternately arranged in the circumferential direction t and form the second tubular portion 5B. The second tubular portion 5B is inside the first tubular portion 5A.

As in the 3 until 7 shown, the first turns 11 of the primary winding 1 and the first turns 21 of the secondary winding 2 overlap in the coil component A1 when viewed in the circumferential direction t. That is, viewed in the circumferential direction t, the first upper line sections 111 and the first upper line sections 211, the first lower line sections 112 and the first lower line sections 212, the first connecting conductor sections 113 and the first connecting conductor sections 213 and the first connecting conductor sections 114 and overlap the first connection conductor sections 214. As in FIGS 3 until 7 shown, the second turns 12 of the primary winding 1 and the second turns 22 of the secondary winding 2 also overlap when viewed in the circumferential direction t. That is, viewed in the circumferential direction t, the second upper line sections 121 and the second upper line sections 221, the second lower line sections 122 and the second lower line sections 222, the second connecting conductor sections 123 and the second connecting conductor sections 223 and the second connecting conductor sections 124 and the overlap second connecting conductor sections 224.

As in the 3 until 7 shown in the coil component A1, each of the first turns 11 of the primary winding 1 partially overlaps one of the second turns 22 of the secondary winding 2, both when viewed in the axial direction s and in the radial direction u. That is, when viewed in the axial direction s, each overlaps of the first upper line sections 111 with one of the second upper line sections 221 and each of the first lower line sections 112 overlaps with one of the second lower line sections 222. Viewed in the radial direction u, each of the first connecting conductor sections 113 overlaps with one of the second connecting conductor sections 223 and each of the first connecting conductor sections 114 overlaps with one of the second connecting conductor sections 224. As in FIGS 3 until 7 shown, each of the second turns 12 of the primary winding 1 also partially overlaps with one of the first turns 21 of the secondary winding 2, both in the axial direction s and in the radial direction u. That is, viewed in the axial direction s, each of the second upper line sections 121 overlaps with one of the first upper line sections 211 and each of the second lower line sections 122 overlaps with one of the first lower line sections 212. Viewed in the radial direction u, each of the second connecting conductor sections 123 overlaps with one of the first connecting conductor sections 213 and each of the second connecting conductor sections 124 overlaps with one of the first Connection conductor sections 214.

A coil encapsulating substrate B1 having the coil component A1 is described below with reference to FIG until described. 15 14 is a perspective view of the coil encapsulating substrate B1. 16 FIG. 14 is a plan view of the coil encapsulating substrate B1. 17 is a sectional view taken along the line XVII-XVII in 16 .

The coil encapsulating substrate B1 is, for example, a circuit board. The coil encapsulating substrate B1 is not limited to a circuit board and may be a semiconductor substrate or a keratin be microsubstrate. The coil encapsulating substrate B1 has the coil component A1. The coil encapsulating substrate B1 may be rectangular in plan view. The coil encapsulating substrate B1 includes a plurality of intermediate layers 7, a plurality of through electrodes 79, an insulating member 8, and a plurality of terminals 9A and 9B.

Each of the intermediate layers 7 can be made of metal. The material of each intermediate layer 7 can be copper (Cu) or a copper alloy, for example. The material is not limited to Cu or a Cu alloy. The intermediate layers 7 comprise a first intermediate layer 71, a second intermediate layer 72, a third intermediate layer 73 and a fourth intermediate layer 74.

The first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73 and the fourth intermediate layer 74 are arranged in this order from a first side (in 17 the top page) to a second page (in 17 the lower side) arranged in the axial direction s at a mutual distance. The first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73 and the fourth intermediate layer 74 each have an interconnect pattern.

The connection pattern of the first intermediate layer 71 provides the first upper wire portions 111 (the first turns 11 of the primary winding 1) and the first upper wire portions 211 (the first turns 21 of the secondary winding 2).

The connection pattern of the second intermediate layer 72 provides the second upper wire portions 121 (the second turns 12 of the primary winding 1) and the second upper wire portions 221 (the second turns 22 of the secondary winding 2).

The connection pattern of the third intermediate layer 73 provides the second lower line sections 122 (the second turns 12 of the primary winding 1) and the second lower line sections 222 (the second turns 22 of the secondary winding 2).

The connection pattern of the fourth intermediate layer 74 provides the first lower line sections 112 (the first turns 11 of the primary winding 1) and the first lower line sections 212 (the first turns 21 of the secondary winding 2).

As in 17 shown, the distance between the first intermediate layer 71 and the second intermediate layer 72 in the axial direction s is approximately the same as the distance between the third intermediate layer 73 and the fourth intermediate layer 74 in the axial direction s. The distance between the second intermediate layer 72 and the third intermediate layer 73 in the axial direction s is greater than both the distance between the first intermediate layer 71 and the second intermediate layer 72 in the axial direction s and the distance between the third intermediate layer 73 and the fourth intermediate layer 74 in the axial direction s. In such an arrangement, in of the primary winding 1 of the coil component A1, the distance between the first upper line sections 111 and the second upper line sections 121 in the axial direction s is approximately the same as the distance between the second lower line sections 122 and the first lower line sections 112 in the axial direction s. The distance between between the second upper line sections 121 and the second lower line sections 122 in the axial direction s is greater than both the distance between the first upper line sections 111 and the second upper line sections 121 in the axial direction s and the distance between the second lower line sections 122 and the first lower line sections 112 in the axial direction s. This applies to the secondary winding 2 of the coil component A1.

The through-electrodes 79 extend through part of the insulating member 8 in the axial direction s. In the present embodiment, each through-electrode 79 may be columnar. The through electrodes 79 include those that electrically connect the first interface layer 71 and the fourth interface layer 74 and those that electrically connect the second interface layer 72 and the third interface layer 73 . The through electrodes 79 electrically connecting the first intermediate layer 71 and the fourth intermediate layer 74 form pairs of first connection conductor portions 113 and 114 (the first turns 11 of the primary winding 1) and pairs of first connection conductor portions 213 and 214 (the first turns 21 of the secondary winding 2 ). The through electrodes 79 electrically connecting the second intermediate layer 72 and the third intermediate layer 73 form pairs of second connection conductor portions 123 and 124 (the second turns 12 of the primary winding 1) and pairs of second connection conductor portions 223 and 224 (the second turns 22 of the secondary winding 2 ).

In the coil encapsulating substrate B1, the connection patterns of the intermediate layers 7 (the first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73, and the fourth intermediate layer 74) and the through electrodes 79 form the coil component A1.

As in the 15 until 17 As shown, the insulating member 8 covers the coil component A1. The insulating member 8 may be made of an insulating resin such as. B. glass epoxy resin (“glass epoxy resin”). The material of the insulating part 8 is not limited to insulating resin, and may be a semiconductor material (e.g. silicon (Si)) subjected to insulation treatment or ceramics. Examples of the insulating treatment are doping with insulating impurities and forming an insulating oxide layer.

As in 17 shown, the insulating part 8 comprises a plurality of insulating layers 81. As in FIG 17 As shown, the insulating layers 81 include one which is arranged between the first intermediate layer 71 and the second intermediate layer 72 in the axial direction s, one which is arranged between the second intermediate layer 72 and the third intermediate layer 73 in the axial direction s, and one which is arranged between the third intermediate layer 73 and the fourth intermediate layer 74 in the axial direction s. The insulating layers 81 also include one formed above the first intermediate layer 71 (on the first side of the axial direction s) and one formed below the fourth intermediate layer 74 (on the second side of the axial direction s).

The pair of terminals 9A electrically connected to the primary winding 1 are the input terminals for the input current into the primary winding 1. Each of the terminals 9A includes a portion formed outside the insulating member 8 and a terminal connecting portion 90A connected to that portion and the primary winding 1 . As through imaginary lines in 14 indicated, the terminal connection portion 90A of one of the terminals 9A is connected to, for example, a first upper lead portion 111 (a first turn 11 of the primary winding 1). As through imaginary lines in 14 indicated, for example, the terminal connection portion 90A of the other terminal 9A is connected to a second lower line portion 122 (a second turn 12 of the primary winding 1). When a voltage is applied to the pair of terminals 9A, an input current flows from one of the terminals 9A to the other terminal 9A through the primary winding 1. As a result, the primary winding 1 generates a magnetic field.

The pair of terminals 9B electrically connected to the secondary winding 2 are the output terminals for the induced current of the secondary winding 2. Each of the terminals 9B includes a portion formed outside the insulating member 8 and a terminal connection portion 90B connected to this portion and the secondary winding 2 . As through imaginary lines in 14 For example, the terminal connection portion 90B of one of the terminals 9B is indicated as being connected to a first lower line portion 212 (a first turn 21 of the secondary winding 2). As through imaginary lines in 14 indicated, for example, the terminal connecting portion 90B of the other terminal 9B is connected to a second upper lead portion 221 (a second turn 22 of the secondary winding 2). The magnetic field generated by the primary winding 1 generates an induced current in the secondary winding 2, causing a potential difference between the two terminals 9B.

In the in the 15 and 16 In the example shown, all the terminal pairs 9A and 9B are formed so as to be exposed from the top (facing the first side in the axial direction s) of the insulating member 8, but the present disclosure is not limited thereto. Whether the pair of terminals 9A and the pair of terminals 9B are exposed from the upper surface of the insulating part 8 or from the lower surface of the insulating part 8 (the surface facing the second side in the axial direction s) can be selected according to the specifications of the coil encapsulating substrate B1 to be determined. Accordingly, the terminal connection section 90A of each terminal 9A and the terminal connection section 90B of each terminal 9B can be opposite to that in FIG 14 shown example can be varied in a suitable manner.

The advantages of the coil component A1 and the coil encapsulating substrate B1 according to the first embodiment are as follows.

The coil component A1 includes the primary winding 1 in which input current flows from the outside. The primary winding 1 includes a plurality of first turns 11 each having an annular shape as viewed in the first direction (circumferential direction t). With such an arrangement, the input current in each first turn 11 flows in opposite directions through two sections opposed in the axial direction s. Therefore, the magnetic flux generated by these sections points in opposite directions on the outside of each first turn 11 and cancels each other out. The first turns 11 are part of the first tubular portion 5A which defines the outer periphery of the coil component A1. Accordingly, the magnetic flux outside each first turn 11 (first tubular portion 5A) is reduced, so that the coil component A1 can reduce the leakage of magnetic flux (or magnetic flux leakage) to the outside.

In the coil component A1, the primary winding 1 comprises the plurality of first turns 11 and the plurality of second windings 12. The direction in which the input current flows in each of the plurality of first windings 11 and the direction in which the input current flows in each of the plurality of second windings 12 are in the first direction (circumferential direction t) considered, same. With such an arrangement, within the second windings 12, ie within the second tubular section 5B, the magnetic flux produced by input current flowing in each first winding 11 and the magnetic flux produced by input current flowing in every second winding 12 point in the same direction and reinforce each other mutual. Accordingly, the magnetic flux inside the second tubular portion 5B is increased, so that the coil component A1 can increase inductance.

The coil component A1 has an air-core structure without a magnetic core for the primary winding 1 and the secondary winding 2. In a coil component with a magnetic core, the magnetic core causes energy losses when the input current to the primary winding 1 is in the high-frequency range. Since the coil component A1 has no magnetic core, the energy loss caused by a magnetic core is avoided even when the input current to the primary winding 1 is in the high frequency range.

In the coil component A1, the plural first turns 11 of the primary winding and the plural first turns 21 of the secondary winding 2 are arranged alternately in the circumferential direction t. Within each first turn 11 of primary winding 1 is a second turn 22 of secondary winding 2, and within each first turn 21 of secondary winding 2 is a second turn 12 of primary winding 1. With such an arrangement, primary winding 1 and secondary winding 2 are reliable coupled. Thus, loss of magnetic flux (or magnetic flux leakage) due to poor coupling between the primary winding 1 and the secondary winding 2 can be prevented.

The coil encapsulating substrate B1 has a plurality of intermediate layers 7 . The plurality of intermediate layers 7 includes the first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73, and the fourth intermediate layer 74 laminated in the axial direction s. The first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73 and the fourth intermediate layer 74 each have a connection pattern, and these connection patterns form the coil component A1. According to such a configuration, the coil component A1 is manufactured through the manufacturing process of a circuit board (or a semiconductor substrate or a ceramic substrate). Thus, the coil encapsulating substrate B1 facilitates manufacturing of the coil component A1 having a complicated wiring structure. In addition, since the coil component A1 is formed by the connection patterns of the intermediate layers 7, the coil encapsulating substrate B1 can reduce the height of the coil component A1.

The first embodiment describes the example in which each of the first turns 11 of the primary winding 1 partially overlaps with one of the second turns 22 of the secondary winding 2 viewed in both the axial direction s and the radial direction u, but the present disclosure is not limited to that. For example, each of the first turns 11 of the primary winding 1 can partially overlap with one of the second turns 12 of the primary winding 1 and not with one of the second turns 22 of the secondary winding 2 both in the axial direction s and in the radial direction u. In this variant, each of the first turns 21 of the secondary winding 2, viewed both in the axial direction s and in the radial direction u, partially overlaps with one of the second turns 22 of the secondary winding 2. However, the coil component A1 is the coil component of this variant with regard to increasing the coupling coefficient between the primary winding 1 and the secondary winding 2 is preferable.

The first embodiment describes the example in which the first coils 11 continuously connected along the circumferential direction t and the second coils 12 continuously connected along the circumferential direction t are connected to each other by the connection portion 13, but the present disclosure is not limited to this. For example, each first turn 11 can be connected to a second turn 12 that is adjacent in the circumferential direction t. That is, the primary winding 1 can be configured such that the input current flows through the first turns 11 and the second turns 12 alternately. The secondary winding 2 can also be designed in such a way that the input current flows alternately through the first windings 21 and the second windings 22 .

The first embodiment describes the example in which in each first turn 11 (primary winding 1), the first upper line portion 111 is inclined in the first sense of the circumferential direction t with respect to the radial direction u and the first lower line portion 112 is inclined in the second sense of the circumferential direction t in with respect to the radial direction u, but the present disclosure is not limited thereto. In every first turn 11 can first upper line section 111 not be inclined in the first sense of the circumferential direction t. In this case, the inclination angle of the first lower wire portion 112 in the circumferential direction t is increased from the radial direction u so that the first connection conductor portions 113 and 114 extend along the axial direction s. Conversely, the first lower line section 112 cannot be inclined in the second sense of the circumferential direction t. In this case, the inclination angle of the first upper wire portion 111 in the circumferential direction t is increased from the radial direction u to make the first connection conductor portions 113 and 114 extend along the axial direction s. Neither the first upper pipe portion 111 nor the first lower pipe portion 112 may be inclined in the circumferential direction t. In this case, the first connection conductor portions 113 and 114 are inclined with respect to the axial direction s. These variations can also apply to the second upper line section 121 and the second lower line section 122 of each second turn 12 (primary winding 1), the first upper line section 211 and the first lower line section 212 of each first turn 21 (secondary winding 2) and the second upper line section 221 and the second lower lead portion 222 of every other turn 22 (secondary winding 2).

The first embodiment describes the example in which in each first turn 11 (primary winding 1), the dimension of the first connecting conductor portion 114 along the circumferential direction t is larger than the dimension of the first connecting conductor portion 113 along the circumferential direction t viewed in the axial direction s, but the present disclosure is not limited thereto. For example, the above dimensions may be approximately the same. In this case, both the distance between two adjacent first upper line portions 111 in the circumferential direction t and the distance between two adjacent first lower line portions 112 in the circumferential direction t are relatively large at a portion closer to the outer peripheral edge 52A, and relatively small at a portion closer to the inner peripheral edge 51A. Such a variation is also applicable to the pair of second connecting conductor portions 123 and 124 of each second turn 12 (primary winding 1), the pair of first connecting conductor portions 213 and 214 of each first turn 21 (secondary winding 2), and the pair of second connecting conductor portions 223 and 224 of each second turn 22 ( Secondary winding 2) applicable.

A coil component A2 according to a second embodiment is described below with reference to FIG 18 until 24 described. The coil component A2 is an inductor, for example, and has a winding 3 . The coil component A2 may have a magnetic core, but preferably has an air core structure with no magnetic core. Like the coil component A1, the coil component A1 can have a toroidal appearance. As with the coil component A1, the overall shape of the coil component A2 is defined by various combinations of the above planar shapes and cross-sectional shapes. The second embodiment describes the example in which the planar shape is ring-shaped and the cross-sectional shape is a rectangular ring-shape. For convenience, in a plan view of the coil component A2, the direction in which the center axis extends is referred to as the axial direction s, the direction around the center axis as the circumferential direction t, and the direction radially extending from the center axis as the radial direction u. The axial direction s corresponds to the thickness direction of the coil component A2. The circumferential direction t corresponds to the toroidal direction of the coil component A2. The cross-sectional shape given above refers to the cross-sectional shape in the plane defined by the axial direction s and the radial direction u.

18 12 is a perspective view showing the coil component A2. 19 is an enlarged view showing part of 18 shows. 20 12 is a plan view of the coil component A2. 21 is a sectional view taken along the line XXI-XXI in 20 . 22 12 is a bottom view showing the coil component A2. 23 FIG. 14 is a view obtained by omitting a part (a part of the first tubular portion 5A described later) from FIG 18 shown perspective view is created. In 23 the connection portion 33 (described later) is omitted. 24 Fig. 12 is a schematic view of the coil 3 viewed along the circumferential direction t.

In the coil component A2, the winding 3 is double-wound. By winding the winding 3 twice, the coil component A2 comprises a first tubular portion 5A and a second tubular portion 5B. As in the first embodiment, both the first tubular portion 5A and the second tubular portion 5B have a toroidal or annular shape. As in 23 shown, the second tubular portion 5B is inside the first tubular portion 5A. The first tubular section 5A defines the outer circumference of the coil component A1 or A2. The first tubular portion 5A and the second tubular portion 5B are each annular in plan view and share a central axis. That is, the center axis of the first tubular portion 5A in plan view and the center axis of the second tubular portion 5B in plan view generally correspond to each other. The direction in which the central axis extends is the axial direction s. The cross-sectional shape of the first tubular portion 5A and the second tubular portion 5B is e.g. B. a rectangular ring.

The winding 3 generates a magnetic field from the outside by the input current. The coil 3 is configured in the same manner as the first coil 1 of the first embodiment. As in the 18 until 24 shown, the winding 3 comprises a multiplicity of first turns 31, a multiplicity of second turns 32 and a connecting section 33.

As in 24 As shown, each of the first turns 31 is in the form of a rectangular ring, e.g. B. viewed along the circumferential direction t. As in the 18 until 20 , 22 and 23 As shown, the first windings 32, viewed in the axial direction s, are arranged side by side along the circumferential direction t. As in 24 As shown, each of the first turns 31 has a first upper lead portion 311, a first lower lead portion 312, and a pair of first connecting conductor portions 313 and 314.

In each of the first turns 31, the first upper wire portion 311 and the first lower wire portion 312 are spaced from each other in the axial direction s, as shown in FIG 24 shown. As in the 20 and 22 As shown, the first upper duct portions 311 and the first lower duct portions 312 each extend from the inner peripheral edge 51A of the first tubular portion 5A toward the outer peripheral edge 52A of the first tubular portion 5A. Each of the first upper pipe portions 311 and each of the first lower pipe portions 312 has a strip shape when viewed in the axial direction s. As in 24 shown, each of the two first connecting conductor sections 313 and 314 extends from the first upper line section 311 along the axial direction s. The first connecting conductor section 313 leads to the first lower line section 312 of the same first turn 31. The first connecting conductor section 314 leads to the first lower line section 312 of the first turn 31 adjacent in the circumferential direction t. Each of the two first connecting conductor sections 313 and 314 is generally orthogonal to the first upper conductor section 311 and the first lower conductor section 312. The first connecting conductor section 313 overlaps the inner peripheral edge 51A of the first tubular section 5A when viewed in the axial direction s. The first connection conductor portion 314 overlaps with the outer peripheral edge 52A of the first tubular portion 5A when viewed in the axial direction s. Each of the two first connection conductor portions 313 and 314 has the shape of a strip extending in a Considering the radial direction u, it expands in the axial direction s.

In the present embodiment, each first upper duct portion 311 is inclined in a first sense of the circumferential direction t with respect to the radial direction u, and each first lower duct portion 312 is inclined in a second sense of the circumferential direction t with respect to the radial direction u. in the in 20 shown example, assuming that the radial direction u pointing to each first connection conductor portion 313 is the radial direction u3, the first upper line portion 311 leading to the first connection conductor portion 313 is in the circumferential direction t clockwise with respect to the radial direction u3 inclined. Each first lower line section 312 leading to the corresponding first connection conductor section 313 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u3. In this way, the first upper line portion 311 and the first lower line portion 312 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the first connection conductor portions 313 and 314 can be formed along the axial direction s.

In the present embodiment, two adjacent first upper pipe sections 311 are arranged at a predetermined distance from each other in the circumferential direction t, as are two adjacent first lower pipe sections 312 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51A side and on the outer peripheral edge 52A side. With such an arrangement, viewed in the axial direction s, the dimension of each first connection conductor portion 314 along the circumferential direction t is greater than the dimension of each first connection conductor portion 313 along the circumferential direction t.

Two adjacent ones of the plurality of first turns 31 in the circumferential direction t are directly connected to each other, so that the input current flowing in the winding 1 flows through the plurality of first turns 31 in sequence. At this time, the input current is transmitted to the first connecting conductor portion 314 of each first turn 31 from the first lower conductor portion 312 of the adjacent first turn 31 located on the first side in the circumferential direction t. The input current then flows from the first connection conductor section 314 via the first upper line section 311 and the first connection conductor section 313 to the first lower lei tion section 312. That is, in the in 24 In the example shown, the input current flows counterclockwise through each first winding 31. The input current is then transferred to the adjacent first winding 11 located on the second side in the circumferential direction t. In this way, the input current of the winding 3 circulates through each of the first turns 31. It should be noted that the direction of the input current in the first turns 31 may be opposite to the example described above. That is, the input current can be transmitted to the first lower conductor portion 312 of each first turn 31 from the first connecting conductor portion 314 of the adjacent first turn 31 located on the second side in the circumferential direction t. That is, in the in 24 In the example shown, the input current can flow through each first winding 31 in a clockwise direction.

As in 24 As shown, each of the second turns 32 is in the shape of a rectangular ring, e.g. B. viewed along the circumferential direction t. As in 24 1, every second turn 32 is located inside every first turn 31, viewed along the circumferential direction t. As in FIGS 20 and 22 shown, the second windings 32, viewed in the axial direction s, are arranged next to one another in the circumferential direction t. As in the 20 and 22 shown are the first turns 31 and the second turns 32, viewed in the axial direction s, arranged alternately in the circumferential direction t. As in 24 As shown, each of the second turns 32 has a second upper lead portion 321, a second lower lead portion 322, and a pair of second connecting conductor portions 323 and 324.

In each of the second turns 32, the second upper wire portion 321 and the second lower wire portion 322 are spaced from each other in the axial direction s as shown in FIG 24 shown. As in the 20 and 22 As shown, the second upper duct portion 321 and the second lower duct portion 322 each extend from the inner peripheral edge 51B of the second tubular portion 5B, viewed in the axial direction, toward the outer peripheral edge 52B of the second tubular portion 5B. Each of the second upper pipe portions 321 and each of the second lower pipe portions 322 has the shape of a strip when viewed in the axial direction s. As in 24 shown, each pair of second connecting conductor sections 323 and 324 extends from the second upper conductor section 321 along the axial direction s. The second connecting conductor section 323 leads to the second lower conductor section 322 of the same second turn 32. The second connecting conductor section 324 leads to the second lower conductor section 322 of the second Winding 32 adjacent in the circumferential direction t. Each pair of the second connection conductor sections 323 and 324 is generally orthogonal to the second upper line section 321 and the second lower line section 322. The second connection conductor section 323 overlaps with the inner peripheral edge 51B of the second tubular section 5B when viewed in the axial direction s second connection conductor portion 324 overlaps with the outer peripheral edge 52B of the second tubular portion 5B when viewed in the axial direction s. Each pair of the second connection conductor portions 323 and 324 has the shape of a strip extending in the axial direction s when viewed along the radial direction u .

In the present embodiment, each second upper duct portion 321 is inclined in the first sense of the circumferential direction t with respect to the radial direction u, and each second lower duct portion 322 is inclined in the second sense of the circumferential direction t with respect to the radial direction u. in the in 20 shown example, assuming that the radial direction u pointing to each second connection conductor portion 323 is the radial direction u3, the second upper line portion 321 leading to the second connection conductor portion 323 is in the circumferential direction t clockwise with respect to the radial direction u3 inclined. Each second lower line section 322 leading to the respective second connecting line section 323 is inclined in the circumferential direction t counterclockwise with respect to the radial direction u3. In this way, the second upper line portion 321 and the second lower line portion 322 are oppositely inclined in the circumferential direction t with respect to the radial direction u, whereby the second connection conductor portions 323 and 324 can be formed along the axial direction s.

In the present embodiment, two adjacent second upper pipe sections 321 are arranged in the circumferential direction t with a predetermined distance between them, as are two adjacent second lower pipe sections 322 in the circumferential direction t. The distance is approximately the same on the inner peripheral edge 51B side and on the outer peripheral edge 52B side. With such an arrangement, viewed in the axial direction s, the dimension of each second connection conductor portion 324 along the circumferential direction t is larger than the dimension of each second connection conductor portion 323 along the circumferential direction t.

Two adjacent ones of the plurality of second turns 32 in the circumferential direction t are connected directly to one another, so that the winding 3 flowing input current flows through the plurality of second windings 32 in succession. At this time, the input current is transmitted to the second connecting conductor portion 324 of each second turn 32 from the second lower conducting portion 322 of the adjacent second turn 32 located on the first side in the circumferential direction t. The input current then flows from the second connection conductor portion 324 to the second lower line portion 322 via the second upper line portion 321 and the second connection conductor portion 323. That is, in the in 24 In the example shown, the input current flows counterclockwise through every second winding 32. Thus, the direction of the input current in the first winding 31 and the direction of the input current in the second winding 32 are the same when viewed along the circumferential direction t. In this way, the input current of the winding 3 circulates through each of the second turns 32. It should be noted that the direction of the input current in the second turns 32 may be opposite to the example described above. That is, the input current can be transmitted to the second lower conductor portion 322 of each second turn 32 from the second connection conductor portion 324 of the adjacent second turn 32 located on the second side in the circumferential direction t. That is, in the in 24 For example, as shown, the input current may flow through every other turn 32 in a clockwise direction. However, it should be noted that the direction of the input current through each first turn 31 and the direction of the input current through each second turn 32 viewed along the circumferential direction t should be the same.

As in 19 shown, the connecting section 33 connects one of the first windings 11 and one of the second windings 32 to one another. The connection portion 33 is connected to, for example, the first lower wire portion 312 of one of the first coils 31 and the second upper wire portion 321 of one of the second coils 32 to electrically connect them.

The winding 3 includes the first turns 31 connected continuously along the circumferential direction t and the second turns 32 connected continuously along the circumferential direction t. The first coil and the second coil are connected by the connection portion 33 . With such an arrangement, the input current of the winding 3 first circulates through the first turns 31 and is then fed to the second turns 32 through the connection portion 33 to circulate through the second turns 32 .

In the coil component A2, the plural first turns 31 are arranged in the circumferential direction t and form the first tubular portion 5A. Also, the plurality of second turns 32 are arranged in the circumferential direction t and form the second tubular portion 5B. The second tubular portion 5B is inside the first tubular portion 5A.

In the coil component A2, each of the first turns 31 overlaps with one of the second turns 32 viewed in the axial direction s and in the radial direction u, as shown in FIGS 18 until 24 shown. That is, viewed in the axial direction s, each of the first upper line sections 311 overlaps with one of the second upper line sections 321 and each of the first lower line sections 312 overlaps with one of the second lower line sections 322. Viewed in the radial direction u, each of the first connecting conductor sections 313 overlaps with one of the second connection conductor sections 323 and each of the first connection conductor sections 314 overlaps with one of the second connection conductor sections 324.

A coil encapsulating substrate B2 having the coil component A2 is described below with reference to FIG until described. 25 14 is a perspective view of the coil encapsulating substrate B2. 26 12 is a plan view of the coil encapsulating substrate B2. 27 is a sectional view taken along the line XXVII-XXVII in 26 .

Like the coil encapsulating substrate B1, the coil encapsulating substrate B2 is a circuit board. The coil encapsulating substrate B2 is also not limited to a circuit board, and may be a semiconductor substrate or a ceramic substrate. The coil encapsulating substrate B2 has the coil component A2. The coil encapsulating substrate B2 may be rectangular in plan view. The coil encapsulating substrate B2 includes a plurality of intermediate layers 7, a plurality of through electrodes 79, an insulating member 8, and a pair of terminals 9C.

As in 27 Illustratively, the intermediate layers 7 in the coil encapsulating substrate B2 again include a first intermediate layer 71, a second intermediate layer 72, a third intermediate layer 73 and a fourth intermediate layer 74 each having a connection pattern.

As in 27 As shown, the connection pattern of the first intermediate layer 71 provides the plurality of first upper line sections 311 . The connection pattern of the second intermediate layer 72 includes the plurality of second upper line portions 321 . the compound The third intermediate layer 73 formation pattern includes the plurality of second lower line portions 322 . The connection pattern of the fourth intermediate layer 74 includes the plurality of first lower line sections 312.

As in 27 shown is also in the present embodiment, the distance between the first intermediate layer 71 and the second intermediate layer 72 in the axial direction s is approximately the same size as the distance between the third intermediate layer 73 and the fourth intermediate layer 74. The distance between the second intermediate layer 72 and the third Intermediate layer 73 in the axial direction s is greater than both the distance between the first intermediate layer 71 and the second intermediate layer 72 in the axial direction s and the distance between the third intermediate layer 73 and the fourth intermediate layer 74 in the axial direction s. In such an arrangement in the winding 3 of the coil component A2, the distance between the first upper wire sections 311 and the second upper wire sections 321 in the axial direction s is about the same as the distance between the second lower wire sections 322 and the first lower wire sections 312 in the axial direction s. The distance between the second upper line sections 321 and the second lower line sections 322 in the axial direction s is larger than both the distance between the first upper line sections 311 and the second upper line sections 321 in the axial direction s and the distance between the second lower line sections 322 and the first lower line sections 312 in the axial direction s.

The through electrodes 79 electrically connecting the first intermediate layer 71 and the fourth intermediate layer 74 form the pair of first connection conductor portions 313 and 314 (the first turns 31). The through electrodes 79 electrically connecting the second interface layer 72 and the third interface layer 73 form the pair of second connection conductor portions 323 and 323 (the second turns 32).

In the coil encapsulating substrate B2, the connection patterns of the intermediate layers 7 (the first intermediate layer 71, the second intermediate layer 72, the third intermediate layer 73 and the fourth intermediate layer 74) and the through electrodes 79 form the coil component A2.

The pair of terminals 9C electrically connected to the coil 3 are the input terminals for the input current into the coil 3. Each of the terminals 9C includes a portion formed outside the insulating member 8 and a terminal connection portion 90C connected to this portion and the coil 3 . As in 25 For example, as shown, the terminal connection portion 90C of one of the terminals 9C is connected to a first upper wire portion 311 (a first turn 31). The terminal connection section 90C of the other terminal 9C is e.g. B. connected to a second lower line portion 322 (a second turn 12). When a voltage is applied to the pair of terminals 9C, an input current flows through the coil 3 from one of the terminals 9C to the other terminal 9C.

in the in 25 In the example shown, each of the terminals 9C is formed so as to be exposed from the top (facing the first side in the axial direction s) of the insulating member 8, but the present disclosure is not limited thereto. Whether the terminal pair 9C is exposed from the top of the insulating part 8 or from the bottom of the insulating part 8 (the side facing the second side in the axial direction s) can be determined according to the specifications of the coil encapsulating substrate B2.

The advantages of the coil component A2 and the coil encapsulating substrate B2 according to the second embodiment are as follows.

The coil component A2 has the winding 3 in which input current flows from the outside. The winding 3 includes a plurality of first turns 31 each having an annular shape as viewed in the first direction (circumferential direction t). With such an arrangement, the input current in each first turn 31 flows in opposite directions through two sections that face each other in the axial direction s. Therefore, the magnetic flux generated by these sections points in opposite directions on the outside of each first turn 31 and cancels each other out. The first turns 31 are part of the first tubular portion 5A which defines the outer periphery of the coil component A2. Accordingly, the magnetic flux outside each first turn 31 (first tubular portion 5A) is reduced, so that the coil component A2 can reduce the leakage of magnetic flux (or magnetic flux leakage) to the outside.

In the coil component A2, the winding 3 includes the first plurality of turns 31 and the second plurality of turns 32. The direction in which the input current flows in each of the first plurality of turns 31 and the direction in which the input current flows in each of the second plurality of turns 32 flows are the same as viewed in the first direction (circumferential direction t). at a sol In this configuration, within the second turns 32, i.e., within the second tubular portion 5B, the magnetic flux generated by the input current flowing in each first turn 31 and the magnetic flux generated by the input current flowing in each second turn 32 point in the same direction and reinforce each other mutual. Accordingly, the magnetic flux inside the second tubular portion 5B is increased, so that the coil component A2 can increase inductance.

The coil component A1 has an air core structure without a magnetic core for the winding 3. In a coil component with a magnetic core, the magnetic core causes energy loss when the input current to the winding 3 is in the high frequency range. Since the coil component A2 has no magnetic core, the energy loss caused by a magnetic core is avoided even if the input current to the winding 3 is in the high frequency range.

In the coil encapsulating substrate B2, the first interface layer 71, the second interface layer 72, the third interface layer 73, and the fourth interface layer 74 each have a connection pattern, and these connection patterns constitute the coil component A2. According to such a configuration, the coil component A2 is manufactured through the manufacturing process of a circuit board (or a semiconductor substrate or a ceramic substrate). Thus, the coil encapsulating substrate B2 facilitates manufacturing of the coil component A2 having a complicated wiring structure. In addition, since the coil component A2 is formed by the connection patterns of the intermediate layers 7, the coil encapsulating substrate B2 can reduce the height of the coil component A2.

The second embodiment describes the example in which each of the first coils 31 overlaps with one of the second coils 32 as viewed in the axial direction s, but the present disclosure is not limited thereto. For example, each of the first windings 31 can overlap one of the second windings 32 only partially or not at all. However, the coil component A2 is preferable to the coil component of this variant in view of the increase in inductance.

The second embodiment describes the example in which in each first turn 31 the first upper line section 311 is inclined in the first sense of the circumferential direction t with respect to the radial direction u and the first lower line section 312 is inclined in the second sense of the circumferential direction t with respect to the radial direction u. but the present disclosure is not limited thereto. In each first turn 31, the first upper line portion 311 may not be inclined in the first sense of the circumferential direction t. In this case, the inclination angle of the first lower wire portion 312 in the circumferential direction t is increased from the radial direction u to make the first connection conductor portions 313 and 314 extend along the axial direction s. Conversely, the first lower conduit portion 312 may not be inclined in the second sense of the circumferential direction t. In this case, the inclination angle of the first upper wire portion 311 in the circumferential direction t is increased from the radial direction u so that the first connection conductor portions 313 and 314 extend along the axial direction s. Neither the first upper pipe portion 311 nor the first lower pipe portion 312 may be inclined in the circumferential direction t. In this case, the first connection conductor portions 313 and 314 are inclined with respect to the axial direction s. These variations also apply to the second upper line section 321 and the second lower line section 322 of every second turn 32.

The second embodiment describes the example in which, in each first turn 31, the dimension of the first connection conductor portion 314 along the circumferential direction t is larger than the dimension of the first connection conductor portion 313 along the circumferential direction t viewed in the axial direction s, but the present disclosure is not limited to that. For example, the above dimensions may be approximately the same. In this case, both the distance between two adjacent first upper line portions 311 in the circumferential direction t and the distance between two adjacent first lower line portions 312 in the circumferential direction t are relatively large at a portion closer to the outer peripheral edge 52A and relatively small at a portion closer to the inner peripheral edge 51A. Such a variation is also applicable to the pair of second connecting conductor portions 323 and 324 of every second turn 32 .

The first embodiment and the second embodiment describe the example in which the through electrodes 79 are columnar in the coil encapsulating substrates B1 and B2, but the present disclosure is not limited thereto. For example, each of the through electrodes 79 may be a through via. The through electrode may be circular in plan view. Each through-electrode 79 may be provided with a plurality of through-holes.

The first embodiment and the second embodiment describe the example in which the coil components A1 and A2 have an annular appearance, but the present disclosure is not limited thereto. For example, each coil component can have a solenoid shape. In the present disclosure, the solenoid shape refers to the shape that is not ring-shaped in plan unlike the toroidal shape, and includes not only those in which a wire is wound around a straight line but also those in which a wire is wound around a straight line curved line is wrapped. In such a variation, the first turns 11 and the second turns 12 of the primary winding 1 and the first turns 21 and the second turns 22 of the secondary winding 2 or the first turns 31 and the second turns 32 of the winding 3 are along a straight or a curved line arranged. However, since the solenoid shape is not annular in plan view, the toroidal shape is more effective in reducing leakage magnetic flux like the coil components A1 and A2.

The first embodiment and the second embodiment describe the example in which each coil component A1 and A2 is formed by the wiring patterns of the intermediate layers 7 of the coil encapsulating substrate, the present disclosure is not limited to this. For example, each of the primary winding 1 and the secondary winding 2 (or the winding 3) can be formed by winding a linear or plate-shaped line or wire.

• Klausel 1. Spulenkomponente umfassend:
  • eine Primärwicklung, die durch einen Eingangsstrom von außen ein Magnetfeld erzeugt; und
  • eine Sekundärwicklung, durch die ein durch das Magnetfeld erzeugter induzierter Strom fließt,
  • wobei die Primärwicklung eine Vielzahl von primären ersten Windungen und eine Vielzahl von primären zweiten Windungen umfasst, wobei jede der primären ersten Windungen und jede der primären zweiten Windungen in einer Betrachtung in einer ersten Richtung ringförmig sind,
  • die Sekundärwicklung eine Vielzahl von Sekundären ersten Windungen und eine Vielzahl von Sekundär zweiten Windungen umfasst, wobei jede der Sekundären ersten Windungen und jede der Sekundären zweiten Windungen in einer Betrachtung in der ersten Richtung ringförmig sind,
  • die Vielzahl von primären ersten Windungen und die Vielzahl von sekundären ersten Windungen abwechselnd in der ersten Richtung angeordnet sind, um einen ersten röhrenförmigen Abschnitt zu bilden,
  • die Vielzahl von primären zweiten Windungen und die Vielzahl von sekundären zweiten Windungen abwechselnd in der ersten Richtung angeordnet sind, um einen zweiten röhrenförmigen Abschnitt zu bilden,
  • der zweite röhrenförmige Abschnitt sich in einer Betrachtung in der ersten Richtung innerhalb des ersten röhrenförmigen Abschnitts befindet, und
  • eine Richtung, in der der Eingangsstrom in jeder der mehreren primären ersten Windungen fließt, und eine Richtung, in der der Eingangsstrom in jeder der mehreren primären zweiten Windungen fließt, gleich sind.
• Klausel 2. Spulenkomponente gemäß Klausel 1, wobei jede der Vielzahl von primären ersten Windungen einen primären ersten oberen Leitungsabschnitt und einen primären ersten unteren Leitungsabschnitt umfasst, die in einer Dickenrichtung orthogonal zu der ersten Richtung voneinander beabstandet sind,
  • jede der Vielzahl von primären zweiten Windungen einen primären zweiten oberen Leitungsabschnitt und einen primären zweiten unteren Leitungsabschnitt umfasst, die in der Dickenrichtung voneinander beabstandet sind,
  • jeder der Vielzahl von sekundären ersten Windungen einen sekundären ersten oberen Leitungsabschnitt und einen Sekundären ersten unteren Leitungsabschnitt umfasst, die in der Dickenrichtung voneinander beabstandet sind, und
  • jede der Vielzahl von sekundären zweiten Windungen einen sekundären zweiten oberen Leitungsabschnitt und einen sekundären zweiten unteren Leitungsabschnitt umfasst, die in der Dickenrichtung voneinander beabstandet sind.
• Klausel 3. Spulenkomponente gemäß Klausel 2, wobei der primäre erste obere Leitungsabschnitt und der sekundäre erste obere Leitungsabschnitt in einer Betrachtung in der ersten Richtung überlappen, und der primäre erste untere Leitungsabschnitt und der sekundäre erste untere Leitungsabschnitt in einer Betrachtung in der ersten Richtung überlappen.
• Klausel 4. Spulenkomponente gemäß Klausel 3, wobei der primäre zweite obere Leitungsabschnitt und der sekundäre zweite obere Leitungsabschnitt in einer Betrachtung in der ersten Richtung überlappen, und der primäre zweite untere Leitungsabschnitt und der sekundäre zweite untere Leitungsabschnitt in einer Betrachtung in der ersten Richtung überlappen.
• Klausel 5. Spulenkomponente gemäß Klausel 4, wobei in der Dickenrichtung ein Abstand zwischen dem primären zweiten oberen Leitungsabschnitt und dem primären zweiten unteren Leitungsabschnitt größer ist als jeweils ein Abstand zwischen dem primären ersten oberen Leitungsabschnitt und dem primären zweiten oberen Leitungsabschnitt und ein Abstand zwischen dem primären zweiten unteren Leitungsabschnitt und dem primären ersten unteren Leitungsabschnitt.
• Klausel 6. Spulenkomponente gemäß einer der Klauseln 3 bis 5, wobei der primäre erste obere Leitungsabschnitt und der sekundäre zweite obere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung überlappen, und der primäre erste untere Leitungsabschnitt und der sekundäre zweite untere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung überlappen.
• Klausel 7. Spulenkomponente gemäß Klausel 6, wobei der primäre zweite obere Leitungsabschnitt und der sekundäre erste obere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung überlappen, und der primäre zweite untere Leitungsabschnitt und der sekundäre erste untere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung überlappen.
• Klausel 8. Spulenkomponente gemäß einer der Klauseln 3 bis 7, wobei jede der Vielzahl von primären ersten Windungen ein Paar primärer erster Verbindungsleiterabschnitte aufweist, die sich jeweils von dem primären ersten oberen Leitungsabschnitt in der Dickenrichtung erstrecken,
  • einer des Paares primärer erster Verbindungsleiterabschnitte sich zu dem primären ersten unteren Leitungsabschnitt führt,
  • jede der Vielzahl von primären zweiten Windungen ein Paar primärer zweiter Verbindungsleiterabschnitte aufweist, die sich jeweils von dem primären zweiten oberen Leitungsabschnitt in der Dickenrichtung erstrecken, und
  • einer des Paares primärer zweiter Verbindungsleiterabschnitte zu dem primären zweiten unteren Leitungsabschnitt führt.
• Klausel 9. Spulenkomponente gemäß Klausel 8, wobei ein anderer des Paares primärer erster Verbindungsleiterabschnitten zu dem primären ersten unteren Leitungsabschnitt einer benachbarten primären ersten Windung führt, und ein anderer des Paares primärer zweiter Verbindungsleiterabschnitten zu dem primären zweiten unteren Leitungsabschnitt einer benachbarten primären zweiten Windung führt.
• Klausel 10. Spulenkomponente gemäß Klausel 9, wobei die Primärwicklung ferner einen primären Verbindungsabschnitt aufweist, der eine der Vielzahl von primären ersten Windungen und eine der Vielzahl primären zweiten Windungen elektrisch verbindet.
• Klausel 11. Spulenkomponente gemäß Klausel 9 oder 10, wobei jede der Vielzahl von sekundären ersten Windungen ein Paar sekundärer erster Verbindungsleiterabschnitte aufweist, die sich jeweils von dem sekundären ersten oberen Leitungsabschnitt in der Dickenrichtung erstrecken,
  • einer des Paares sekundärer erster Verbindungsleiterabschnitte zu dem sekundären ersten unteren Leitungsabschnitt führt,
  • jede der Vielzahl von sekundären zweiten Windungen ein Paar sekundärer zweiter Verbindungsleiterabschnitte aufweist, die sich jeweils von dem sekundären zweiten oberen Leitungsabschnitt in der Dickenrichtung erstrecken, und
  • einer des Paares sekundärer zweiter Verbindungsleiterabschnitte zu dem sekundären zweiten unteren Leitungsabschnitt führt.
• Klausel 12. Spulenkomponente gemäß Klausel 11, wobei ein anderer des Paares sekundärer erster Verbindungsleiterabschnitte zu dem sekundären ersten unteren Leitungsabschnitt einer benachbarten sekundären ersten Windung führt, und ein anderer des Paares sekundärer zweiter Verbindungsleiterabschnitten zu dem sekundären zweiten unteren Leitungsabschnitt einer benachbarten sekundären zweiten Windung führt.
• Klausel 13. Spulenkomponente gemäß Klausel 12, wobei die Sekundärwicklung ferner einen Sekundärverbindungsabschnitt aufweist, der eine der Vielzahl von sekundären ersten Windungen und eine der Vielzahl von sekundären zweiten Windungen elektrisch verbindet.
• Klausel 14. Spulenkomponente gemäß einer der Klauseln 2 bis 13, wobei sowohl der erste röhrenförmige Abschnitt als auch der zweite röhrenförmige Abschnitt in einer Betrachtung in der Dickenrichtung ringförmig sind, wobei eine Umfangsrichtung davon der ersten Richtung entspricht.
• Klausel 15. Spulenkomponente gemäß Klausel 14, wobei sich der primäre erste obere Leitungsabschnitt, der primäre erste untere Leitungsabschnitt, der sekundäre erste obere Leitungsabschnitt und der sekundäre erste untere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung jeweils von einer inneren Umfangskante zu einer äußeren Umfangskante des ersten röhrenförmigen Abschnitts erstrecken.
• Klausel 16. Spulenkomponente gemäß Klausel 15, wobei jeder des primären ersten oberen Leitungsabschnitts, primären ersten unteren Leitungsabschnitts, sekundären ersten oberen Leitungsabschnitts und sekundären ersten unteren Leitungsabschnitts in einer Betrachtung in der Dickenrichtung die Form eines Streifens hat.
• Klausel 17. Spulenkomponente gemäß Klausel 15 oder 16, wobei sowohl der primäre erste obere Leitungsabschnitt als auch der sekundäre erste obere Leitungsabschnitt in einem ersten Sinn der Umfangsrichtung des ersten röhrenförmigen Abschnitts in Bezug auf eine Radialrichtung des ersten röhrenförmigen Abschnitts, in der Dickenrichtung betrachtet, geneigt sind, und Sowohl der primäre erste untere Leitungsabschnitt als auch der sekundäre erste untere Leitungsabschnitt in einem zweiten Sinn der Umfangsrichtung des ersten röhrenförmigen Abschnitts in Bezug auf die Radialrichtung des ersten röhrenförmigen Abschnitts, in der Dickenrichtung betrachtet, geneigt sind.
• Klausel 18. Spulenkomponente gemäß einer der Klauseln 14 bis 17, wobei sich der primäre zweite obere Leitungsabschnitt, der primäre zweite untere Leitungsabschnitt, der sekundäre zweite obere Leitungsabschnitt und der sekundäre zweite untere Leitungsabschnitt in einer Betrachtung in der Dickenrichtung jeweils von einer inneren Umfangskante zu einer äußeren Umfangskante des zweiten röhrenförmigen Abschnitts erstrecken.
• Klausel 19. Spulenkomponente gemäß Klausel 18, wobei der primäre zweite obere Leitungsabschnitt, der primäre zweite untere Leitungsabschnitt, der sekundäre zweite obere Leitungsabschnitt und der sekundäre zweite untere Leitungsabschnitt jeweils die Form eines Streifens in der Dickenrichtung haben.
• Klausel 20. Spulenkomponente gemäß Klausel 18 oder 19, wobei sowohl der primäre zweite obere Leitungsabschnitt als auch der sekundäre zweite obere Leitungsabschnitt in einem ersten Sinn der Umfangsrichtung des zweiten röhrenförmigen Abschnitts in Bezug auf eine Radialrichtung des zweiten röhrenförmigen Abschnitts, in der Dickenrichtung betrachtet, geneigt sind, und sowohl der primäre zweite untere Leitungsabschnitt als auch der sekundäre zweite untere Leitungsabschnitt in einem zweiten Sinn der Umfangsrichtung des zweiten röhrenförmigen Abschnitts in Bezug auf die Radialrichtung des zweiten röhrenförmigen Abschnitts, in der Dickenrichtung betrachtet, geneigt sind.
• Klausel 21. Spulenkomponente umfassend:
  • eine Wicklung, die durch einen Eingangsstrom von außen ein Magnetfeld erzeugt,
  • wobei die Wicklung eine Vielzahl von ersten Windungen und eine Vielzahl von zweiten Windungen umfasst, wobei jede der ersten Windungen und jede der zweiten Windungen in einer Betrachtung in einer ersten Richtung ringförmig sind,
  • die Vielzahl der ersten Windungen in der ersten Richtung angeordnet sind, um einen ersten röhrenförmigen Abschnitt zu bilden,
  • die Vielzahl der zweiten Windungen in der ersten Richtung angeordnet sind, um einen zweiten röhrenförmigen Abschnitt zu bilden,
  • der zweite röhrenförmige Abschnitt sich in einer Betrachtung in der ersten Richtung innerhalb des ersten röhrenförmigen Abschnitts befindet,
  • der erste röhrenförmige Abschnitt und der zweite röhrenförmige Abschnitt jeweils ringförmig sind, in einer Betrachtung in einer Dickenrichtung orthogonal zu der ersten Richtung, und
  • eine Richtung, in der der Eingangsstrom in jeder der Vielzahl von primären ersten Windungen fließt, und eine Richtung, in der der Eingangsstrom in jeder der Vielzahl von primären zweiten Windungen fließt, gleich sind.
• Klausel 22. Spuleneinbettungssubstrat, das die Spulenkomponente gemäß einer der Klauseln 2 bis 21 aufweist, umfassend:
  • eine Vielzahl von Zwischenschichten, die in der Dickenrichtung geschichtet sind; und
  • eine Vielzahl von Isolierschichten, die zwischen der Vielzahl von Zwischenschichten in der Dickenrichtung liegen,
  • wobei die Spulenkomponente durch Verdrahtungsmuster der mehreren Zwischenschichten gebildet wird.
• Klausel 23. Spuleneinbettungssubstrat gemäß Klausel 22, wobei die Spulenkomponente ein Transformator ist.

The coil component and the coil encapsulating substrate according to the present disclosure are not limited to the aforementioned embodiments. The specific configuration of the coil component and the coil encapsulating substrate according to the present disclosure can be varied in design in many ways. The present disclosure includes the embodiments described in the following clauses.

• Clause 1. Coil component comprising:
  • a primary winding that generates a magnetic field by an input current from the outside; and
  • a secondary winding through which an induced current generated by the magnetic field flows,
  • wherein the primary winding comprises a plurality of primary first turns and a plurality of primary second turns, each of the primary first turns and each of the primary second turns being annular when viewed in a first direction,
  • the secondary winding includes a plurality of secondary first turns and a plurality of secondary second turns, each of the secondary first turns and each of the secondary second turns being annular as viewed in the first direction,
  • the plurality of primary first coils and the plurality of secondary first coils are alternately arranged in the first direction to form a first tubular section,
  • the plurality of primary second coils and the plurality of secondary second coils are arranged alternately in the first direction to form a second tubular section,
  • the second tubular section is within the first tubular section when viewed in the first direction, and
  • a direction in which the input current flows in each of the plurality of primary first windings and a direction in which the input current flows in each of the plurality of primary second windings are the same.
• Clause 2. The coil component according to Clause 1, wherein each of the plurality of primary first turns includes a primary first upper lead portion and a primary first lower lead portion spaced from each other in a thickness direction orthogonal to the first direction,
  • each of the plurality of primary second turns includes a primary second upper wire portion and a primary second lower wire portion spaced from each other in the thickness direction,
  • each of the plurality of secondary first turns includes a secondary first upper lead portion and a secondary first lower lead portion spaced from each other in the thickness direction, and
  • each of the plurality of secondary second turns includes a secondary second upper lead portion and a secondary second lower lead portion spaced from each other in the thickness direction.
• Clause 3. The coil component of clause 2, wherein the primary first upper lead portion and the secondary first upper lead portion overlap when viewed in the first direction, and the primary first lower lead portion and the secondary first lower lead portion overlap when viewed in the first direction.
• Clause 4. The coil component according to clause 3, wherein the primary second upper lead portion and the secondary second upper lead portion overlap when viewed in the first direction, and the primary second lower lead portion and the secondary second lower lead portion overlap when viewed in the first direction.
• Clause 5. The coil component according to Clause 4, wherein, in the thickness direction, a distance between the primary second upper wire section and the primary second lower wire section is greater than a distance between the primary first upper wire section and the primary second upper wire section and a distance between the primary second lower conduit section and the primary first lower conduit section.
• Clause 6. The coil component according to any one of clauses 3 to 5, wherein the primary first upper lead portion and the secondary second upper lead portion overlap when viewed in the thickness direction, and the primary first lower lead portion and the secondary second lower lead portion when viewed in the thickness direction overlap.
• Clause 7. The coil component according to clause 6, wherein the primary second upper lead portion and the secondary first upper lead portion overlap when viewed in the thickness direction, and the primary second lower lead portion and the secondary first lower lead portion overlap when viewed in the thickness direction.
• Clause 8. The coil component according to any one of clauses 3 to 7, wherein each of the plurality of primary first turns has a pair of primary first connection conductor portions each extending from the primary first upper conductor portion in the thickness direction,
  • one of the pair of primary first connection conductor sections leads to the primary first lower line section,
  • each of the plurality of primary second turns has a pair of primary second connection conductor portions each extending from the primary second upper conductor portion in the thickness direction, and
  • one of the pair of primary second connection conductor sections leads to the primary second lower line section.
• Clause 9. A coil component according to clause 8, wherein another one of the pair of primary first connecting conductor sections leads to the primary first lower conductor section of an adjacent primary first turn, and another one of the pair of primary second connecting conductor sections leads to the primary second lower conductor section of an adjacent primary second turn.
• Clause 10. The coil component according to Clause 9, wherein the primary winding further includes a primary connection portion electrically connecting one of the plurality of primary first turns and one of the plurality of primary second turns.
• Clause 11. The coil component according to Clause 9 or 10, wherein each of the plurality of secondary first turns has a pair of secondary first connection conductor portions each extending from the secondary first upper conductor portion in the thickness direction,
  • one of the pair of secondary first connecting conductor sections leads to the secondary first lower line section,
  • each of the plurality of secondary second turns has a pair of secondary second connection conductor portions each extending from the secondary second upper conductor portion in the thickness direction, and
  • one of the pair of secondary second connection conductor sections leads to the secondary second lower line section.
• Clause 12. A coil component according to clause 11, wherein another one of the pair of secondary first connecting conductor sections leads to the secondary first lower conductor section of an adjacent secondary first turn, and another one of the pair of secondary second connecting conductor sections leads to the secondary second lower conductor section of an adjacent secondary second turn.
• Clause 13. The coil component according to Clause 12, wherein the secondary winding further includes a secondary connection portion electrically connecting one of the plurality of secondary first turns and one of the plurality of secondary second turns.
• Clause 14. The coil component according to any one of clauses 2 to 13, wherein both the first tubular portion and the second tubular portion are annular when viewed in the thickness direction, wherein a Circumferential direction of which corresponds to the first direction.
• Clause 15. The coil component according to Clause 14, wherein the primary first upper lead portion, the primary first lower lead portion, the secondary first upper lead portion and the secondary first lower lead portion, when viewed in the thickness direction, each extend from an inner peripheral edge to an outer peripheral edge of the first tubular portion extend.
• Clause 16. The coil component according to Clause 15, wherein each of the primary first upper lead portion, primary first lower lead portion, secondary first upper lead portion and secondary first lower lead portion has the shape of a strip when viewed in the thickness direction.
• Clause 17. The coil component according to Clause 15 or 16, wherein both the primary first upper line portion and the secondary first upper line portion are inclined in a first sense of the circumferential direction of the first tubular portion with respect to a radial direction of the first tubular portion viewed in the thickness direction and both the primary first lower duct portion and the secondary first lower duct portion are inclined in a second sense of the circumferential direction of the first tubular portion with respect to the radial direction of the first tubular portion viewed in the thickness direction.
• Clause 18. The coil component according to any one of clauses 14 to 17, wherein the primary second upper lead portion, the primary second lower lead portion, the secondary second upper lead portion and the secondary second lower lead portion each vary from an inner peripheral edge to an inner peripheral edge when viewed in the thickness direction outer peripheral edge of the second tubular portion.
• Clause 19. The coil component according to Clause 18, wherein the primary second upper lead portion, the primary second lower lead portion, the secondary second upper lead portion and the secondary second lower lead portion each have the shape of a strip in the thickness direction.
• Clause 20. The coil component according to Clause 18 or 19, wherein both the primary second upper line portion and the secondary second upper line portion are inclined in a first sense of the circumferential direction of the second tubular portion with respect to a radial direction of the second tubular portion viewed in the thickness direction and both the primary second lower duct portion and the secondary second lower duct portion are inclined in a second sense of the circumferential direction of the second tubular portion with respect to the radial direction of the second tubular portion viewed in the thickness direction.
• Clause 21. Coil component comprising:
  • a winding that generates a magnetic field through an input current from the outside,
  • wherein the winding comprises a plurality of first turns and a plurality of second turns, each of the first turns and each of the second turns being annular when viewed in a first direction,
  • the plurality of first turns are arranged in the first direction to form a first tubular section,
  • the plurality of second turns are arranged in the first direction to form a second tubular section,
  • the second tubular portion is within the first tubular portion when viewed in the first direction,
  • the first tubular portion and the second tubular portion are each annular as viewed in a thickness direction orthogonal to the first direction, and
  • a direction in which the input current flows in each of the plurality of primary first windings and a direction in which the input current flows in each of the plurality of primary second windings are the same.
• Clause 22. A coil encapsulation substrate having the coil component according to any one of clauses 2 to 21, comprising:
  • a plurality of intermediate layers layered in the thickness direction; and
  • a plurality of insulating layers interposed between the plurality of intermediate layers in the thickness direction,
  • wherein the coil component is formed by wiring patterns of the plurality of intermediate layers.
• Clause 23. The coil encapsulation substrate according to Clause 22, wherein the coil component is a transformer.

Reference List

A1, A2

coil component

1

primary winding

11

first turn

111

First upper line section

112

First lower line section

113, 114

First connecting conductor section

12

second turn

121

Second upper line section

122

Second lower line section

123, 124

Second connection conductor section

13

connection section

2

secondary winding

21

first turn

211

First upper line section

212

First lower line section

213, 214

First connecting conductor section

22

second turn

221

Second upper line section

222

Second lower line section

223, 224

Second connection conductor section

23

connection section

3

winding

31

first turn

311

First upper line section

312

First lower line section

313, 314

First connecting conductor section

32

second turn

321

Second upper line section

322

Second lower line section

323, 324

Second connection conductor section

33

connection section

5A

First tubular section

5B

Second tubular section

51A, 51B

Inner perimeter edge

52A, 52B

Outer perimeter edge

B1, B2

coil encapsulation substrate

7

intermediate layer

71

First intermediate layer

72

Second intermediate layer

73

Third intermediate layer

74

Fourth intermediate layer

79

through electrode

8th

insulating part

81

insulating layer

9A, 9B, 9C

terminal

90A, 90B, 90C

terminal connection section

s

axial direction

t

circumferential direction

and

radial direction

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• JP2011124250A [0003]

Claims (23)

Coil component comprising: a primary winding that generates a magnetic field by an input current from the outside; and a secondary winding through which an induced current generated by the magnetic field flows, wherein the primary winding comprises a plurality of primary first turns and a plurality of primary second turns, each of the primary first turns and each of the primary second turns being annular when viewed in a first direction, the secondary winding includes a plurality of secondary first turns and a plurality of secondary second turns, each of the secondary first turns and each of the secondary second turns being annular as viewed in the first direction, the plurality of primary first coils and the plurality of secondary first coils are alternately arranged in the first direction to form a first tubular section, the plurality of primary second coils and the plurality of secondary second coils are arranged alternately in the first direction to form a second tubular section, the second tubular section is within the first tubular section when viewed in the first direction, and a direction in which the input current flows in each of the plurality of primary first windings and a direction in which the input current flows in each of the plurality of primary second windings are the same. Coil component according to claim 1 , wherein each of the plurality of primary first turns includes a primary first upper lead portion and a primary first lower lead portion spaced apart in a thickness direction orthogonal to the first direction, each of the plurality of primary second turns includes a primary second upper lead portion and a primary second lower wire portion spaced from each other in the thickness direction, each of the plurality of secondary first turns includes a secondary first upper wire portion and a secondary first lower wire portion spaced from each other in the thickness direction, and each of the plurality of secondary second turns one a secondary second upper duct section and a secondary second lower duct section spaced from each other in the thickness direction. Coil component according to claim 2 wherein the primary first upper duct section and the secondary first upper duct section overlap when viewed in the first direction, and the primary first lower duct section and the secondary first lower duct section overlap when viewed in the first direction. Coil component according to claim 3 wherein the primary second upper duct section and the secondary second upper duct section overlap when viewed in the first direction, and the primary second lower duct section and the secondary second lower duct section overlap when viewed in the first direction. Coil component according to claim 4 , wherein, in the thickness direction, a distance between the primary second upper duct section and the primary second lower duct section is larger than each of a distance between the primary first upper duct section and the primary second upper duct section and a distance between the primary second lower duct section and the primary first lower line section. Coil component according to one of claims 3 until 5 wherein the primary first upper duct section and the secondary second upper duct section overlap when viewed in the thickness direction, and the primary first lower duct section and the secondary second lower duct section overlap when viewed in the thickness direction. Coil component according to claim 6 wherein the primary second upper duct section and the secondary first upper duct section overlap when viewed in the thickness direction, and the primary second lower duct section and the secondary first lower duct section overlap when viewed in the thickness direction. Coil component according to one of claims 3 until 7 , wherein each of the plurality of primary first turns has a pair of primary first connection conductor sections each extending from the primary first upper line section in the thickness direction, one of the pair of primary first connection conductor sections leading to the primary first lower line section, each of the plurality of primary second turns has a pair of primary second connection conductor portions each extending from the primary second upper conductor portion in the thickness direction, and one of the pair of primary second connection conductor sections leads to the primary second lower line section. The coil component of claim clause 8, wherein another of said pair of primary first connection conductor sections leads to said primary first lower conductor section of an adjacent primary first turn and another of said pair of primary second connection conductor sections leads to said primary second lower conductor section of an adjacent primary second turn. Coil component according to claim 9 , wherein the primary winding further includes a primary connection portion electrically connecting one of the plurality of primary first turns and one of the plurality of primary second turns. Coil component according to claim 9 or 10 , wherein each of the plurality of secondary first turns has a pair of secondary first connection conductor sections each extending from the secondary first upper line section in the thickness direction, one of the pair of secondary first connection conductor sections leading to the secondary first lower line section, each of the plurality of secondary second turns having a pair of secondary second connection conductor portions each extending from the secondary second upper line portion in the thickness direction, and one of the pair of secondary second connection conductor portions leading to the secondary second lower line portion. Coil component according to claim 11 wherein another one of the pair of secondary first connection conductor sections leads to the secondary first lower line section of an adjacent secondary first turn, and another of the pair of secondary second connection conductor sections leads to the secondary second lower line section of an adjacent secondary second turn. Coil component according to claim 12 , wherein the secondary winding further includes a secondary connection portion that electrically connects one of the plurality of secondary first turns and one of the plurality of secondary second turns. Coil component according to one of claims 2 until 13 , wherein each of the first tubular portion and the second tubular portion is ring-shaped when viewed in the thickness direction, with a circumferential direction thereof corresponding to the first direction. Coil component according to Claim 14 wherein the primary first upper duct portion, the primary first lower duct portion, the secondary first upper duct portion and the secondary first lower duct portion each extend from an inner peripheral edge to an outer peripheral edge of the first tubular portion when viewed in the thickness direction. Coil component according to claim 15 wherein each of the primary first upper duct section, primary first lower duct section, secondary first upper duct section and secondary first lower duct section has the shape of a strip when viewed in the thickness direction. Coil component according to claim 15 or 16 , wherein both the primary first upper duct section and the secondary first upper duct section are inclined in a first sense of the circumferential direction of the first tubular section with respect to a radial direction of the first tubular section viewed in the thickness direction, and both the primary first lower duct section and the secondary first lower conduit portion are inclined in a second sense of the circumferential direction of the first tubular portion with respect to the radial direction of the first tubular portion viewed in the thickness direction. Coil component according to one of Claims 14 until 17 wherein the primary second upper duct section, the primary second lower duct section, the secondary second upper duct section and the secondary second lower duct section each extend from an inner peripheral edge to an outer peripheral edge of the second tubular portion when viewed in the thickness direction. Coil component according to Claim 18 wherein the primary second upper duct portion, the primary second lower duct portion, the secondary second upper duct portion, and the secondary second lower duct portion each have the shape of a strip in the thickness direction. Coil component according to Claim 18 or 19 , wherein both the primary second upper duct section and the secondary second upper duct section are in a first sense of the circumferential direction of the second tubular section with respect to a radial direction of the second tubular portion viewed in the thickness direction, and each of the primary second lower duct portion and the secondary second lower duct portion in a second sense of the circumferential direction of the second tubular portion with respect to the radial direction of the second tubular portion viewed in the thickness direction , are inclined. Coil component comprising: a winding that generates a magnetic field through an input current from the outside, wherein the winding comprises a plurality of first turns and a plurality of second turns, each of the first turns and each of the second turns being annular as viewed in a first direction, the plurality of first turns are arranged in the first direction to form a first tubular section, the plurality of second turns are arranged in the first direction to form a second tubular section, the second tubular portion is within the first tubular portion when viewed in the first direction, the first tubular portion and the second tubular portion are each annular as viewed in a thickness direction orthogonal to the first direction, and a direction in which the input current flows in each of the plurality of primary first windings and a direction in which the input current flows in each of the plurality of primary second windings are the same. Coil encapsulation substrate, which the coil component according to any one of claims 2 until 21 comprising: a plurality of intermediate layers laminated in the thickness direction; and a plurality of insulating layers interposed between the plurality of intermediate layers in the thickness direction, wherein the coil component is formed by wiring patterns of the plurality of intermediate layers. Coil encapsulation substrate according to Claim 22 , where the coil component is a transformer.

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